In the scene when Han meets Jabba the Hutt in the Hangar on Mos Eisley, Han walks over Jabbas tail and stands in front of him. When he turns to talk to Jabba his hand passed right through Jabba's chin!

(And before anyone mentions is I know the original scene was shot with a human playing Jabba and that Jabba was transposed in for the S.Edition. It's obvious that it's because the Jabba graphic is bigger than the actor but it's still quite amusing..

Most of you SHOULD know this (I'm sure it's on the behind the scenes for the special edition)- but like anonymous there said, Jabba was originally human, and it wasn't written that Han Solo steps on Jabba's tail. But, obviously, humans don't have tails. So when Harrison Ford walked around the actor playing Jabba, he was walking through the later Jabba's tail. So Lucas and his crew at ILM had to lift Han's image over Hutt's tail in post production.

The big question is, how could Han step on Jabba's tail and get away with it? Especially with all the bounty hunters and bodyguards there. I always thought that Jabba was far too meek in this scene, letting Han literally walk all over him and haggle prices.